Rename whole data sets

IsBeth · 05-22-2014, 06:27 AM

Hello! Sorry if my question seems a bit stupid, cause I think it has to be easy, but I don't have enough knowhow...
I want to rename a character string in R which contains numbers. It's something like this:

"3435" "4364" a.s.o.

I want to change that so there are words before the numbers. There must be the same words for the whole length of the object, like this:

"mygenes_3435" "mygenes_4364"...

is there a command to do this? Would it be similar if I wanted to rename a data.frame for example? I really need help, it's very urgent! =(

Jeremy · 05-27-2014, 08:11 PM

call that string MyString
NewString <- paste("mygenes_", MyString, sep="")

If that is a column of a data frame called DF
DF$MyString <- paste("mygenes_", DF$MyString, sep="")

dpryan · 05-28-2014, 12:24 AM

Another option is sprintf:

Code:

NewString <- sprintf("mygenes_%s", MyString)

Paste is easier for concatenating two strings like this, but should you want to merge multiple things (possibly with formatting), then you'll find sprintf very helpful.

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05-22-2014, 06:27 AM	#1
IsBeth Member Location: Spain Join Date: Nov 2013 Posts: 28	Rename whole data sets Hello! Sorry if my question seems a bit stupid, cause I think it has to be easy, but I don't have enough knowhow... I want to rename a character string in R which contains numbers. It's something like this: "3435" "4364" a.s.o. I want to change that so there are words before the numbers. There must be the same words for the whole length of the object, like this: "mygenes_3435" "mygenes_4364"... is there a command to do this? Would it be similar if I wanted to rename a data.frame for example? I really need help, it's very urgent! =( Last edited by IsBeth; 05-22-2014 at 06:54 AM.

05-28-2014, 12:24 AM	#3
dpryan Devon Ryan Location: Freiburg, Germany Join Date: Jul 2011 Posts: 3,480	Another option is sprintf: Code: NewString <- sprintf("mygenes_%s", MyString) Paste is easier for concatenating two strings like this, but should you want to merge multiple things (possibly with formatting), then you'll find sprintf very helpful.

05-27-2014, 08:11 PM	#2
Jeremy Senior Member Location: Pathum Thani, Thailand Join Date: Nov 2009 Posts: 190	call that string MyString NewString <- paste("mygenes_", MyString, sep="") If that is a column of a data frame called DF DF$MyString <- paste("mygenes_", DF$MyString, sep="")